GCDAMP History Time-Line -Years

• 11,000 BP Paleo-Indian peoples occupy Grand Canyon region

1869

Major John Wesley Powell leads first recored expedition to traverse Grand Canyon

1902

Reclamation Act Creates the Bureau of Reclamation

1916

National Park Service Organic Act passed

1919

Grand Canyon National Park created

1922

Colorado River Compact signed allocating the Colorado River water between the upper and the lower basins. Upper basin States have the right to use 7.5 maf/yr only if that quantity is available after meeting delivery requirements of 7.5 maf/yr to the Lower basin plus the amount required to satisfy anticipated claims by Mexico.

1928

Boulder Canyon Project Act passed authorizing Hoover Dam.

1935

Hoover Dam completed

1944

Treaty with Mexico obligating the US to provide 1.5 maf of Colorado River water to Mexico annually

1948

Upper Colorado River Basin Compact signed

1956

Colorado River Storage Project Act passed authorizing Glen Canyon Dam

1963

Glen Canyon Dam completed as part of the Colorado River Storage Project.

1964

U.S. Supreme Court decision in Arizona v. California confirmed apportionments of Colorado River water authorized in 1928 Boulder Canyon Project Act, including Nevada's allocation of 0.3 maf per year. The Decree in this case set many of the rules under which the river is operated.

1965

United States contract for delivery of power from the Colorado River Storage Project to customers.

1974

Colorado River Basin Salinity Control Act authorized the construction, operation, and maintenance of works in the Colorado River Basin to control the salinity of Colorado River water available for use in the United States and Mexico. Some GCDAMP stakeholders participate in the Salinity Control Forums created by the act.

1988

Salt Lake City Area Integrated Projects post-1989 after a series of public information and comment forums.

1994

Memorandum of Agreement signed for development of a Lower Colorado River Multi-Species Conservation Plan between state agencies in Nevada, California, and Arizona and federal agencies, including the Bureau of Land Management, Bureau of Reclamation, Fish and Wildlife Service, and the National Park Service.

1996

Record of Decision on the Operation of Glen Canyon Dam Final Environmental Impact Statement to comply with consultation requirements of the Grand Canyon Protection Act of 1992.

1997

• The AMWG held their first meeting on September 10-11, 1997, and officially formed the Glen Canyon Technical Work Group (TWG)as a subgroup to work on tasks charged to them by the AMWG.
• The TWG was formed to provide stakeholders with involvement in federal decisions concerning the operation of Glen Canyon Dam and Power Plant.

2001

Humpback Chub population in Grand Canyon was in decline in the 1990s, and reached a low of about 5,000 adult fish in 2001.

2012

• Razorback Sucker found in lower part of Grand Canyon- believed the fish traveled some 50 miles upstream from Lake Mead. Last one recorded had been caught in 1990. (October 9th)